Plastic film recycling is one of the most important processes in modern plastic waste treatment. Materials such as LDPE film, LLDPE stretch film, PP woven bags, agricultural film, and post-consumer packaging film are widely used, but they are also difficult to recycle efficiently because of their low bulk density, high moisture content, and contamination with sand, labels, food residue, or organic waste.
あ プラスチックフィルムリサイクル洗濯ライン is designed to clean, reduce, wash, dewater, and dry waste plastic film before it enters the pelletizing process or is sold as clean film flakes. Choosing the right washing system can directly affect final pellet quality, production stability, labor cost, water consumption, and long-term operating profit.
This guide explains how a plastic film washing line works, what machines are included, what materials can be processed, and how to choose the right system for your recycling plant.
What Is a Plastic Film Recycling Washing Line?
A plastic film recycling washing line is a complete プラスチックリサイクル洗浄システム used to process dirty or contaminated plastic film waste into clean, dry film flakes.
- ベルトコンベアー
- 金属探知機
- Plastic shredder or crusher
- Pre-washer
- 摩擦ワッシャー
- Floating washing tank
- Dewatering machine
- Thermal drying system
- Storage silo
- Electrical control system
The main purpose of the system is to remove impurities such as sand, soil, labels, oil, organic residue, paper, and mixed plastics. After washing and drying, the cleaned film flakes can be sent to a プラスチックペレットライン for granulation.
What Materials Can Be Processed?
LDPEフィルム
LDPE film is commonly used in packaging, bags, shrink film, and industrial wrapping. It is one of the most common materials processed by plastic film washing lines.
LLDPE Stretch Film
Stretch film is widely used for pallet wrapping and logistics packaging. It is usually lightweight, soft, and easy to wrap around machine shafts, so the washing line must be designed to avoid material blockage.
PP織りバッグ
PP woven bags are used for rice, fertilizer, animal feed, chemicals, and construction materials. They often contain dust, sand, and printed ink, requiring strong washing and friction cleaning.
農業映画
Agricultural film is one of the most difficult materials to recycle because it often contains large amounts of soil, sand, stones, plant residue, and moisture. For this material, a stronger pre-washing and sediment removal system is recommended.
Post-Consumer Packaging Film
Post-consumer film may include mixed plastic bags, supermarket film, packaging waste, and household plastic film. It often requires manual sorting or automatic sorting before washing.
Typical Plastic Film Washing Line Process
1. 給餌
Waste plastic film is loaded onto a belt conveyor or feeding platform. If the material contains metal, a metal detector can be installed before the shredder or crusher to protect the cutting blades.
2. Shredding or Crushing
Large pieces of film are reduced into smaller flakes. For soft and bulky materials, a plastic shredder is often used before the crusher to improve feeding stability and reduce machine load. For cleaner film, a wet crusher may be used directly.
3. Pre-Washing
The pre-washer removes loose dirt, sand, and heavy contamination before the material enters the main washing system. This step is especially important for agricultural film and post-consumer film.
4. Friction Washing
あ 摩擦ワッシャー uses high-speed rotation and water flow to scrub the film surface. It helps remove labels, soil, paper, organic residue, and other surface contamination.
5. Floating Washing
The floating washing tank separates materials by density. PE and PP film usually float on water, while heavier contaminants such as sand, metal, stones, and some mixed plastics sink to the bottom.
6. Dewatering
After washing, the film flakes contain a large amount of water. A 遠心脱水機 removes most of the surface moisture through high-speed mechanical force.
7. Thermal Drying
Because plastic film is thin and lightweight, it is difficult to dry completely by mechanical dewatering alone. A hot air 加熱乾燥システム is often used after the dewatering machine to reduce final moisture content.
8. Storage
The cleaned and dried film flakes are transported into a storage silo. From there, they can be packed, stored, or fed directly into a pelletizing machine.
Key Machines in a Plastic Film Washing Line
プラスチックシュレッダー
あ プラスチックシュレッダー reduces large bundles, rolls, bags, or compressed film into smaller pieces. It is useful for bulky materials and improves feeding stability for downstream equipment.
プラスチック粉砕機
あ プラスチッククラッシャー cuts the film into smaller flakes suitable for washing and drying. Wet crushers are commonly used in film washing lines because they help reduce dust and start cleaning the material during crushing.
フリクションワッシャー
の 摩擦ワッシャー is one of the most important cleaning machines in the line. It uses high-speed rotation to remove dirt and impurities from the film surface.
Floating Washing Tank
The floating tank helps separate PE/PP film from heavy contaminants. It also provides additional rinsing and material transport.
脱水機
の 脱水機 removes water from washed film flakes. Lower moisture content improves drying efficiency and reduces energy consumption in the pelletizing process.
熱乾燥機
の 加熱乾燥システム uses hot air to further reduce moisture. This is especially important when the final material will be pelletized, because excessive moisture can cause bubbles, unstable extrusion, and poor pellet quality.
Storage Silo
貯蔵サイロは生産フローをバランス良く保ち、洗浄ラインと造粒ラインを接続するのを容易にします。.
適切なプラスチックフィルム洗浄ラインを選ぶ方法
材料の種類
異なる素材には異なる機械構成が必要です。例えば、清浄なLDPE包装フィルムはシンプルな洗浄プロセスが必要ですが、農業フィルムは強い前洗浄と砂取りが必要です。.
Contamination Level
素材に大量の土、油、ラベル、または食品残渣が含まれている場合、洗浄システムにはより強い摩擦洗浄、長い浮遊タンク、そして優れた水濾過が必要です。.
必要処理能力
一般的なプラスチックフィルム洗浄ラインの容量には、300 kg/h、500 kg/h、1,000 kg/h、1,500 kg/h、および2,000 kg/h以上があります。高容量ラインは強い給餌、大きな洗浄タンク、より強力な脱水、そして優れた自動化が必要です。.
Final Moisture Requirement
清浄なフィルムフラックが直接造粒に送られる場合、水分管理は非常に重要です。低水分はエキスチュージョン安定性と最終造粒品質を向上させます。.
自動化レベル
高度に自動化された洗浄ラインは、労働コストを削減し、生産の一致性を向上させます。自動化オプションには、自動給餌、水循環、スクリュー輸送、制御パネル、そして統合乾燥システムがあります。.
Available Factory Space
フィルム洗浄ラインは、素材給餌、洗浄タンク、乾燥パイプ、電気盤、そしてメンテナンスアクセスに十分なスペースが必要です。設置前にレイアウトを計画する必要があります。.
プラスチックフィルム洗浄ラインの容量オプション
Small Capacity: 300–500 kg/h
小規模なリサイクル工場、地域の収集センター、または試験リサイクルプロジェクトに適しています。.
Medium Capacity: 800–1,000 kg/h
LDPEフィルム、PP織物袋、または消費後のフィルムを処理する商業リサイクルプラントに適しています。.
Large Capacity: 1,500–2,000 kg/h+
安定した原材料供給と連続的な造粒生産を持つ工業リサイクルプラントに適しています。.
容量を選ぶ際には、機械出力だけでなく原材料給餌、労働、水処理、乾燥効率、そして造粒容量も考慮する必要があります。.
プラスチックフィルム洗浄ラインと硬質プラスチック洗浄ラインの比較
プラスチックフィルムと硬質プラスチックは異なるリサイクルラインの設計が必要です。.
- プラスチックフィルムは軽量で、シャフトに巻きやすいですが、均等に給餌が難しく、乾燥も難しく、洗浄後には水分が高くなることが多いです。.
- 硬質プラスチックは圧縮しやすく、沈み浮き洗浄で分離しやすく、機械的に乾燥しやすく、輸送中に安定です。.
これらの違いから、フィルム洗浄ラインは特別な給餌設計、巻き取り防止構造、強力な脱水、そして熱乾燥が必要です。.
プラスチックフィルムリサイクルにおける一般的な問題
High Moisture Content
プラスチックフィルムは洗浄後水を保持します。水分が高すぎると、造粒品質に影響を与え、エネルギー消費を増加させることができます。.
Sand and Soil Contamination
Agricultural film and post-consumer film often contain sand and soil. These impurities can damage blades, increase machine wear, and reduce pellet quality.
素材のラッピング
Soft film can wrap around shafts, rotors, and conveyors. Proper machine design is important to reduce blockage and downtime.
Low Bulk Density
Plastic film takes up a large volume but has low weight. This creates challenges in feeding, transportation, storage, and pelletizing.
混合材料
Film waste may contain PET, PVC, paper, metal, or other contaminants. Sorting and floating separation are important to improve final product quality.
How to Improve Washing Efficiency
- Sort material before washing
- Remove metal before shredding or crushing
- Use wet crushing for dirty film
- Add pre-washing for agricultural film
- Maintain clean water circulation
- Replace worn blades regularly
- Control final moisture before pelletizing
- Match washing capacity with pelletizing capacity
- Design enough space for maintenance
A good washing line is not only about machine capacity. It must also provide stable operation, easy maintenance, efficient water use, and consistent final material quality.
When Do You Need a Complete Film Washing and Pelletizing Line?
If your goal is to produce recycled plastic pellets, the washing line is usually only the first part of the recycling process. After washing and drying, the clean film flakes can be sent into a pelletizing line.
- Film washing line
- Dewatering and drying system
- Agglomerator or compactor
- 押出機
- Melt filter
- ペレタイザー
- 冷却システム
- Silo and packing system
For dirty film, washing quality directly affects pelletizing stability. Poor washing can lead to screen blockage, black spots, bubbles, odor, and low pellet value.
Technical Specifications to Compare Before Buying
Most suppliers can describe the washing process, but serious buyers should compare measurable technical specifications before choosing a plastic film washing line. These parameters affect daily output, drying performance, power consumption, and maintenance cost.
| パラメータ | なぜそれが重要なのか | What to Check |
| Input material form | Loose film, baled film, rolls, and woven bags feed differently. | Confirm whether a shredder, bale opener, or forced feeding system is required. |
| Hourly capacity | Rated capacity may differ from real contaminated-material throughput. | Ask whether capacity is based on clean LDPE film or dirty agricultural film. |
| 最終水分 | High moisture affects pelletizing stability and pellet quality. | Check the dewatering machine, thermal dryer, and whether a film squeezer is recommended. |
| Water circulation | Poor water management increases operating cost and contamination carryover. | Ask about filtration, sediment discharge, and wastewater handling. |
| Installed power | Power affects operating cost and factory electrical planning. | Compare total installed power and expected running load. |
| Blade and wear parts | Dirty film with sand accelerates wear. | Check blade material, access design, and spare parts availability. |
| Automation level | Automation reduces labor and improves consistency. | Confirm control cabinet functions, interlocks, alarms, and line synchronization. |
Plastic Film Washing Line ROI and Payback Factors
A plastic film washing line should be evaluated not only by purchase price, but also by the value it creates from dirty film waste. A low-cost line that leaves high moisture, unstable output, or poor flake quality can reduce pelletizing efficiency and extend the real payback period.
Key ROI Inputs
- Raw material cost per ton
- Clean flake or pellet selling price
- Real hourly output after sorting and washing
- Operating hours per day
- Labor cost and automation level
- Electricity and water cost
- Wastewater treatment and sludge disposal cost
- Blade, screen, bearing, and wear-part replacement cost
- Downtime caused by wrapping, blockage, or maintenance
Simple Payback Logic
A practical payback estimate can start with this formula: monthly gross margin equals clean output per month multiplied by the value difference between washed material and incoming dirty film, minus electricity, water, labor, maintenance, and wastewater costs. The payback period is the total project investment divided by monthly net profit.
For film recycling projects, the largest hidden ROI drivers are usually final moisture, contamination removal, stable feeding, and reduced downtime. These factors often matter more than the lowest equipment price.
Maintenance Checklist for Film Washing Lines
Maintenance planning is a common content gap in many supplier pages, but it is critical for real production. A film washing line processes dirty, abrasive, and lightweight material, so preventive maintenance helps avoid unexpected downtime.
毎日のチェック
- Remove wrapped film from shafts, conveyors, and washer outlets.
- Check crusher or shredder blades for abnormal wear or impact damage.
- Clean screens, sediment zones, and water channels.
- Inspect dewatering machine vibration and discharge consistency.
- Confirm motors, bearings, and gearboxes are not overheating.
Weekly or Monthly Checks
- Sharpen or rotate blades based on cutting performance.
- Inspect friction washer paddles and screens.
- Check thermal dryer pipes for buildup or blockage.
- Review electrical cabinet alarms and sensor performance.
- Check water circulation pumps, valves, and sediment removal systems.
Questions to Ask a Supplier Before Ordering
Before signing a contract, ask detailed questions that match your real material and factory conditions. This helps avoid buying a standard line that does not fit your input contamination or final product goal.
- Can you test my actual LDPE film, PP woven bags, or agricultural film before final configuration?
- What final moisture level can your system achieve for my material?
- Do you recommend a centrifugal dryer, film squeezer, thermal dryer, or a combination?
- How does the line handle sand, soil, paper, labels, oil, and metal contamination?
- What is the real output for dirty material, not only clean film?
- What factory space, power, and water supply are required?
- Can the washing line connect directly with a pelletizing line?
- What spare parts should be stocked for the first year?
- Do you provide installation, commissioning, operator training, and remote support?
- Can the line be expanded later if capacity increases?
Recommended Configurations by Material Type
| 材料 | Recommended Configuration Focus | Reason |
| Clean LDPE packaging film | Wet crusher, friction washer, floating tank, dewatering, thermal drying | Balanced cleaning with lower contamination load. |
| Post-consumer mixed film | Sorting, shredder or crusher, multiple washing stages, stronger drying | Mixed contamination requires better separation and washing control. |
| 農業フィルム | Pre-washer, sediment removal, robust crusher, friction washing, water treatment | Soil and sand can damage blades and reduce flake quality. |
| PP織りバッグ | Strong size reduction, friction washing, floating rinsing, dewatering | Dust, printing residue, and woven structure need aggressive cleaning. |
| Film for pelletizing | Low-moisture drying system plus stable storage or feeding silo | Moisture and inconsistent feeding directly affect extrusion quality. |
よくある質問
プラスチックフィルムリサイクル洗浄ラインはどのような用途で使用されていますか？
プラスチックフィルムリサイクル洗浄ラインは、LDPEフィルム、LLDPEストレッチフィルム、PPウェーブバッグ、農業用フィルム、包装フィルムなどの廃棄プラスチックフィルムの清掃に使用されます。ペレット化や再販売前に、土、砂、ラベル、油、その他の汚染物を取り除きます。.
農業用フィルムはフィルム洗浄ラインでリサイクルできますか？
はい。農業用フィルムはリサイクル可能ですが、通常は強力な洗浄システムが必要です。それは土、砂、石、有機残留物が含まれているためです。事前洗浄システムと効果的な沈殿物除去が推奨されます。.
フィルム洗浄後の最終水分含量は何ですか？
最終水分は脱水分離および乾燥システムに依存します。適切な遠心脱水分離機および熱乾燥機を使用することで、ペレット化のための水分含有量が大幅に減少させられます。.
プラスチックフィルムにはリサイクル機か粉砕機が必要ですか？
素材の大きさと密度によって異なります。大きくて圧縮されたフィルムは、粉砕する前にシュレッダーが必要です。清潔で緩やかなフィルムは、直接湿式粉砕機で処理できます。.
プラスチックフィルム洗浄ラインのどの容量を選べばよいですか？
一般的な容量は300 kg/h、500 kg/h、1,000 kg/h、および2,000 kg/hがございます。最適な選択は原材料の供給、労働力、工場のスペース、および造粒能力に依存します。.
洗浄されたフィルムフラックは直接ペレット化できますか？
はい、フィルムフラックが十分にきれいで乾燥している場合、プラスチックペレットラインに投入することができます。ペレットの品質を向上させるために、水分と汚染物は慎重に管理する必要があります。.
結論
A plastic film recycling washing line is essential for processing LDPE film, LLDPE stretch film, PP woven bags, agricultural film, and post-consumer plastic packaging waste. The right washing system can improve material cleanliness, reduce moisture, protect downstream pelletizing equipment, and increase the value of recycled plastic.
When choosing a film washing line, recycling plants should consider material type, contamination level, required capacity, drying performance, automation level, and final application. A properly designed system can help achieve stable production and high-quality recycled plastic output.
If you are planning a plastic film recycling project, send us your raw material photos, contamination level, and target capacity. Our team can help design a complete plastic film washing and drying system for your recycling plant.
